Cortical Development
Cortical Development - Related Videos
16:33
Functional Calcium Imaging in Developing Cortical Networks
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Cited by 32 •
2011
Spontaneous activity of developing neuronal networks can be measured using AM-ester forms of calcium-sensitive indicator dyes. Changes in intracellular calcium, indicating neuronal activation, are detected as transient changes in indicator fluorescence with one- or two-photon imaging. This protocol can be adapted for a range of developmentally-dependent neuronal networks in vitro.
13:47
Ex utero Electroporation and Whole Hemisphere Explants: A Simple Experimental Method for Studies of Early Cortical Development
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Cited by 14 •
2013
This protocol describes an improved explant procedure that involves ex utero electroporation, dissection and culture of entire cerebral hemispheres from the embryonic mouse. The preparation facilitates pharmacological studies and assays of gene function during early cortical development.
11:25
Isolation and Culture of Mouse Cortical Astrocytes
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Cited by 460 •
2013
Astrocytes have been recognized to be versatile cells participating in fundamental biological processes that are essential for normal brain development and function, and central nervous system repair. Here we present a rapid procedure to obtain pure mouse astrocyte cultures to study the biology of this major class of central nervous system cells.
08:49
Visualization of Cortical Modules in Flattened Mammalian Cortices
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Cited by 27 •
2018
This article describes a detailed methodology to obtain flattened tangential sections from mammalian cortices and visualize cortical modules using histochemical and immunohistochemical methods.
09:47
Isolation of Cerebrospinal Fluid from Rodent Embryos for use with Dissected Cerebral Cortical Explants
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Cited by 20 •
2013
The ventricular cerebrospinal fluid (CSF) bathes the neuroepithelial and cerebral cortical progenitor cells during early brain development in the embryo. Here we describe the method developed to isolate ventricular CSF from rodent embryos of different ages in order to investigate its biological function. In addition, we demonstrate our cerebral cortical explant dissection and culture technique that allows for explant growth with minimal volumes of culture medium or CSF.
FAQs
Neural progenitors provide the expanding cell population from which cortical neurons arise. Their proliferation increases the pool of available cells, while differentiation commits selected progenitors to neuronal identities. The balance between these processes affects how many neurons become available for later migration, layering, and circuit formation, making early cell production a critical foundation for mature cortical organization.
Neuronal migration places newly differentiated neurons into appropriate positions, and layering organizes those cells into the cortex’s characteristic architecture. These steps depend on coordinated genetic programs and extracellular signals, which provide positional and developmental guidance. If movement or placement is mistimed, the resulting arrangement can alter how later axons and synapses connect, linking cellular positioning to circuit structure.
Axon growth and synapse formation establish physical routes and communication points between developing neurons, but initial connections are not necessarily final. Spontaneous activity helps developing networks become active before mature sensory input is fully established, while sensory-driven activity contributes later refinement. Together, these influences adjust connectivity so emerging circuits become more functionally organized.
Genetic programs regulate developmental decisions within neural cells, whereas extracellular signals convey information from the surrounding environment. Their coordination helps control proliferation, differentiation, migration, and organization into layers rather than treating each event as independent. This interaction matters because cortical architecture emerges from both cell-intrinsic instructions and external guidance, providing a framework for understanding how developmental disruptions may affect neural circuits.
A useful model can be evaluated by whether it reflects the sequence of progenitor proliferation, neuronal differentiation, migration, and layering, followed by axon growth and synapse formation. Activity-dependent refinement provides an additional dimension for assessing maturation. Considering this progression helps investigators judge which aspects of cortical organization an organoid reproduces and which developmental features remain incomplete.
Because cortical function depends on precisely timed cell production, positioning, connectivity, and refinement, developmental studies can identify where normal organization may be disrupted. Researchers can examine how altered genetic programs, extracellular signals, or activity-related processes affect emerging circuits. This developmental perspective helps connect cellular and circuit-level changes with disorders that involve perception, movement, language, or cognition.
Tracking how cortical cells acquire identities, reach appropriate layers, extend axons, and form synapses reveals the sequence underlying circuit assembly. That knowledge can inform investigations of brain repair by highlighting developmental events that must be recreated or supported when restoring organization and connectivity. The goal is not simply to generate cells, but to understand how they become integrated into functional cortical circuits.